Carriage mechanism for adding-machines.



0. 9.1mm, JR. CARRIAGE MECHANISM FOR ADDING MACHINES.

91 3,738. APPLICATION IIL'ED AUG. 6, 1906. Patented Mar 2 4 SHEBTSSHEET 1.

0. G. KREIS, JR. CARRIAGE MECHANISM FOR ADDING MACHINES.

APPLIGATION FILED AUG. 6, 1906. 91 3,738.

Patented Mar. 2, 1909.

4 SHEETS-SHEET 2.

was... $41 %W 1% 650% 0. G. KREIS, JR. CARRIAGE MECHANISM FOR ADDING MACHINES.

' APPLIOATION FILED AUG. 6, 1906. 91 3,738. Patented Mar. 2, 1909.

4 SHEETS-SHEET 3.

fww T I 0. G. KREIS, JR. CARRIAGE MECHANISM FOR ADDING MACHINES. 4 APPLIOATION FILED AUG. 6, 1906. 913,738. Patented Mar. 2, 1909.

4 SHEETS-SHEET 4.

UNITED STATES PATENT OFFICE.

OSCAR C. KREIS,JR., OF DETROIT, MICHIGAN, ASSIGNOR TO BURROUGHS ADDING MACHINE COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

CARRIAGE MECHANISM FOR ADDING-MACHINES.

Specification of Letters Patent.

Patented March 2, 1909.

To all whom it may concern:

Be it known that I, OSCAR O. KREIs, Jr., a citizen of the United States, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Carriage Mechanism for Adding-Machines, of which the following is a specification.

The invention relates to various features of laterally shifting carriage attachments, such as-commonly employed in adding machines and illustrated, for example, in the Pike patent No. 595,864, issued December 21, 1897, to American Arithmometer Com- I Oiie of the objects of the present invention is to provide for automatically disabling the,

line spacing mechanism in such an attachment by the act of moving the platen from printing position.

Another object of the invention is to provide improved means for varying the extent of feed in line spacing, to the point of eliminating such feed altogether when desirable as in the performance of tabulating work, while at the same time providing for line spacing by hand under s ch circumstances.

Still another object is to make the line spacing operation positive through suitable connections with the working parts of the adding machine, and also to positively prevent any excessive movement of the feeding devices either in the advance thereof or the recovery for the next operation.

The invention also aims to improve the paper feed by insuring uniform pressure between the feed rolls and the platen.

With these and incidental objects in view, the invention consists in certain novel features of construction and combinations of parts, the essential elements whereof are recited in the appended claims and a preferred embodiment of which is shown in the accompanying drawings and described hereafter.

Of said drawings, Figure 1 represents in rear elevation an adding machine of the well known Burroughs type, with the improvements of the present invention applied thereto; Fig. 2 represents the carriage attachment in right side elevation with the rear portion of the adding machine in section; Fig. 3 represents a vertical section of the attachment taken at about the longitudinal center thereof; Fig. 4 represents the attachment in left side elevation with a portion of the adding machine casing in section; Fig. 5 is a view similar to Fig. 2 but showing the platen rocked rearwardly out of printing position Fig. 6 is a fragmentary rear elevation of part of the attachment; Fig. 7 is a sectional detaii of a certain abutment or ta pet piece; Fig. 8 represents the attachment in top plan view with some of the parts broken out to disclose mechanism below the same, a portion of the adding machine casing being shown in horizontal section; Fig. 9 is a horizontal section below the plane of Fig. 8 affordin a top plan view of a certain stop rod, together with a horizontal section of part, of the adding machine casing and a top )lan view of devices attached thereto whic cooperate with said stop rod; and Fig. 10 is a sectional detail, of feed or pressure roller devices.

While the attachment of the (present invention is here shown as designe for use in connection with the well known Burroughs adding machine exemplified in the above mentioned Pike patent and also in the William S. Burroughs patents Nos. 504,963 and 505,078, issued September-.12, 1893', it W'lll be understood that the invention is not confined to use in this particular connection, but

'may be advantageously employed with other ty es of adding machines.

It will not be necessary to a full understanding of the invention to enter into any description of the adding machine proper further than to point out certain working parts thereof, from which motion is derive for accomplishing the automatic line spacing in the carriage mechanism.

In the drawings the reference numeral 1710 designates the back panel of a Burroughs adding machine which is open at the upper part for the projection therethrough of type in the printing operation. Secured across the back of this panel is a supporting bracket 1765 formed with race ways of ball bearings for the laterally shifting paper carriage 176.7 formed with similar race wa s, as shown in Fig. 3. This carriage has suitable end plates 1717 and 171.7 which project rearwardly and upwardly and downwardly to provide bearings for rock rods or shafts 1708, 1704 and 1705 performing various functions as hereinafter described. The upper passes up by the edge of sai also carried by the cradle.

one of, these rock shafts 1705 carries the platen cradle comprising end plates 1719 and 1719 and connecting cross rods 17 00 and 1701. The usual platen roller 17.98 is supported in this cradle upon a rotary shaft 1700 and by rocking the cradle on the shaft 1705, preferably by means of the knobs or thumb nuts 1746, the platen may be moved into and out of printing position in rear of the above mentioned opening in the casing of the adding machine. The paper is introduced from the rear between gages 1728" slidingly mounted upon a cross bar 1727 of the cradle, and passes to the underside of the platen, being guided by a curved plate 1725, The paper thence .extends over the front sideof the platen, where it is presented to the ty e, a suitable guide plate 1710 beingsecure in the opening of the adding machine casing, appropriately apertured for the passage of the type and of such form as tocausc the paper to-nug the platen. W'hen wide (paper is used it guide-plate, but a narrow strip, such as used when simply listing amounts, will be passed under the cross rod 1701 which carries a severing blade 1721.

The feed pressure of the paper against the platen is produced through the employment of several sections of. rollers 17 94, each section being movable independently of every other so as to insure the proper pressure of the paper against the platen roller throughout its width and hence uniform advance of the paper. Each set of rollers 1794 composing the section occupies an opening in the :guide plate 1725 (Fig. 3) and is journaled in the outer ends of a pair of arms 1711 which in turn are journaled upon the shaft 17 05 and pressed upwardly by springs 17 80 encircling the shaft and bearing at their rear ends against the underside of the cross red 1700, while at their forward ends they embrace pins or studs 1751 of the arms 1711, respectively. (See Fig. 10.) A series of collars 1734, one for each arm 1711, are secured to the rock shaft 1705, said collars having forwardly projecting fingers 1712 (see Fig, 10)

bearing upon the upper sides of studs 17 52 of said arms 1711, so that by turning the said shaft, which may be done by moving the finger lever 1724, all the pressure rollers may be withdrawn from contact with the platen roller, when it is desired to release the paper from the feed pressure. This finger lever projects in rear of the platen at a convenient location for manipulation by the right hand of the operator and is limited in its movements by a screw 1724 occupying a slot in the lever and entering one side plate of the cradle. The finger lever is, of course, secured to the shaft 1705 and it has a forward projection connected by a spring 1786 with to hold the fingers 1712 normally elevated to permit the springs 1780 to have free play in pressing the feed rollers against the platen.

It is quite important, particularly in tabulating work, to hold the platen firmly to it's printing position and to that end means are provided for supplementing the gravity of the parts usually relied upon to maintain the pro er position of the platen. One end plate of t e cradle is formed with a downward and rearward extension 1710 (Fig. 4) whose rear edge extends concentrically with the pivot of the cradle and whose side edges extend tangentially thereof. A lever 1713 is mounted to turn upon the left hand end of the rock shaft 1703 and a relatively strong spring 1783 connects the forwardly extending arm ,of said lever with a stud 1761 on the end plate of the carriage, for the purpose of forcibly thrusting the rearwardly extending arm of the lever in a forward direction. This rearwardly extending arm is formed as a hanger at its outer end and an anti-friction roller 1741 is mounted in this hanger and bears against the edges of the rearward extension 1719. In the normal position of parts with the cradle rocked forwardly, said roller bears against the lower tangential edge of said extension and thereby causes the spring 1783 to'exert a pressure holding the platen to its printing position. When the cradle'is thrown ack to remove the platen from its printing position'the tension of this spring must, of course, be overcome as the lug or extension 1719 forces its way past the roller. However, as soon as the concentric edge of the lug passes out of contact with the roller the latter will be pressed against the upper tangential edge of said lug so that the spring 1783 then exerts itself to hold the cradle in its extreme rearward position. It will be seen that said spring serves as a means for automatically completing the rocking movement of the cradle in coming to its forward as well as its rearward osition. These positions are determined y the abutment of radial shoulders 1719 on the end plates of the cradleagainstlaterally projecting flanges 1717 of the end plates of the carriage.

The roller platen with its journal 1700 is as usual rotatable in the cradle and the left hand end of said ournal carries a V-toothed wheel 1729 engaged by an alining roll 1739 at the end of an anm 1716 pivoted on a shaft or rod 1700 extending between the plates of the cradle, said arm being drawn forwardly by a spring 1782 connected at one end thereto and at the other end to a stud 1716 projecting from said end plate of the cradle, as 1 shown in Fig. 4. The usual knob or thumb piece1795 secured to the opposite end of the a stud 1761.011 the cradle, said spring serving 1 ratchet wheel 1728 secured to the platen spindle 1700 between the knob 1705 and the right hand end plate of the cradle, and a pawl 1722 carried by a pair of arms 1713 mounted to turn upon said journal, the pawl being held in engagement with the ratchet Wheel by a spring 1787 connected at one end thereto and at the other end to said arms. A stud 1758 forming the pivotal connection between the pawl and its supporting arms also constitutes a pivotal connection between said arms and a link or pitman 1722 curved of which it receives determined,

at its lower end in the arc of circle described about the rock shaft 17 03. This curved part of the link or pitman is formed with a longitudinal slot 1722 d curved in the same arc and in one side of the link a series of'circular recesses .1722' are formed, one of these recesses being at the upper end of the slot and the others at intermediate points in the length thereof and all equally spaced apart. An abutment or tappet piece occupies said curved slot and is adjustable lengthwise thereof, its position being determined by engagement with one or another of said recesses. This abutment device (see Fig. 7) comprises an external member 1747 in the form of a knurled knob with a stem formed to fit in the recess of the pitrnan, and a bolt 1753 sliding through said stem and thence extending through the pitman slot on the opposite side a retaining nut 1753 The head of this bolt fits a recess in the knob 1747 and aspiral spring 1788 surrounds the bolt within said recess, bearing at one end against the bolt head and at the other against the base of the recess so as to enforce the seating of the stem of the knob in the recess of the slotted portion of the pitman.

It will be seen that b relative longitudinal movements between the knob and the bolt against the pressure of the spring the knob can be disengaged from the recess of the pitman and then the entire tpppet piece moved lengthwise of the pitman. and engaged with any other of the recesses in the latter. In this manner, the length of paper feed can be as will presently a pear. An arm 1724 secured to the rock shat 1703 carrics a screw stud 1760 at its outer end occupying the slot 1722. This screw stud acting against a tappet piece 1747 will thrust the link or pitman 1722 upwardly and draw the pawl 1722 over one or more teeth of the ratchet wheel 1728 according to the adjustment, of said tappet piece On the return stroke of the arm 17 2.4 the said screw stud acting against the lower end of the slot in the pitman draws the latter down and thereby causes the pawl 1722.120 advance the platen a distance corres onding with the len th of the tooth or test which the pawl has been retracted. Said screw stud normally occupies the lower end of the slot holding the pawl in its advanced position and is at this time entirely below the of the ratchet whee over lowermost recess in the side of the pitman, as shown in Fig. 2. When the tappet piece 1747 is engaged with this lowermost recess the pitman and consequently the pawl partake of the full movement of thearm 1724 and. the relation of the parts is such that this results in the retraction of the awi over three teeth of the ratchet wheel an of course a corresponding advance of the platen when the actuating arm 1724 moves downward. When the tappet piece is engaged with the next recess above there is lost motion to the extent of one tooth of the ratchet wheel before the screw stud 1760 abuts the tappet piece 1747. Hence under this adjustment the platen is advanced to the extent of but two teeth of the ratchet wheel. Correspondingly, when the tappet iece is adjusted in the third recess from the ower end of the pitman the platen is advanced to the extent of but one tooth of the ratchet wheel. The uppermost recess of the series provides for positioning the ta pet piece beyond the range of movement of the screw stud so that no advance of the platen will take place under such conditions. This will be availed of in some kinds of tabulating work where an amount is printed and the carriage then shift ed laterally and another amount printed on the same horizontal line. When a series of amounts have been printed on a horizontal line, the line s acing can be readily done by hand by use of the knob'17 95, and the cross tabulating continued after moving the carriage to the right.

The oscillat ons of the actuating arm 1724 are produced through thefollowing described connections. A series of forwardly extending arms 17,23 secured to the rock shaft 1703 are united at their outer ends in a strip which enters the longitudinal slot of a rod 1706 in such manner as to produce a rigid connection between the strip and the rod. The latter is round in cross section and is embraced by a rearwardly projecting fork 1723 of an up ri ht bar 1723 slidingly mounted upon tne adding machine panel 1710 by means of screw studs .1723 secured in the latter and occupying slots of the bar. The latter has at its lower end a rearwardly projecting lug 1723 receiving a bolt 1759* which extends through the slotted rear end of a lever 1720 lying alongside of said lug and being pivoted intermediate its ends upon a screw stud 1753 of a standard 765 within the adding machine casin as shown in fig. 2. The outer end of t e forward arm of said lever carries a roll 1720 occupying a cam slot 121 of a plate 121 secured to a rock shaft 100 of the adding machine, which rock shaft receives an oscillation in every operation of said machine. Thus the said plate is moved from the full line position shown in Fig. 2 to the dotted line position and back again so that the resulting co-action of the cam slot with the roll will produce vibration of the lever and consequent reciprocation of the bar 17 23 which in turn vibrates the shaft 1703 and the arm 1724 Lateral shifting of the carriage does not disturb these connections because the rod 1706 is arranged to slide in the fork 1723) and maintain its operative relation thereto under any lateral adjustment of the carriage. It wfll be seen that through the connection described a positive actuation of the feed pawl is effected.

Excessive movement of the pawl in either direction is prevented by a stop arm 1714 secured to the shaft 1705, the latter having no movement except when the feed rollers 17 94 are to be removed from contact with the platen roller which only results fromaccompanying an advance of the platen.

On the lower side of the shaft this stop arm confronts the tappet piece 1753' to limit the upward movement thereof when acted upon by the screw stud 1760. It will be seen that this stop arm thus serves the purpose of positively preventing any excessive moverent of the actuatingpawl ineither direction. When the platen is thrown back occasion usually arises for turning the same by hand one way or the other and hence the pawl 1722 must be disengaged from the ratchet wheel 1728. The present invention provides for bringing this about automatically by the act of throwing back the platen and the means here shown for accomplishing this result are of the following description; The stud on the side of the pawl to which one end of the spring 1787 is connected, pro'ects for engage ment with the rear edge of t e curved upper arm 1714 of a lever pivoted intermedlate its 1 ends upon the screw stud 1761, the rear edge of the depending ar'm1714 of said lever being formed as a cam to engage the forward edge of a lug 1717 formed as an extension of one of the before-mentioned lugs 1717 a (see Fig. 5). The portion of this rear edge of the depending arm of the lever which acts as a cam normally stands a short distance below said lug 1717", as shown in Fig. 2, and a spring 1785 connecting the upper arm of the lever with the right hand end plate of the cradle, holds this upper arm normally forward, permitting the pawl 1722 to freely engage the ratchet wheel. When the platen is thrown back the lever is carried upward and rearward and its cam edge encounters the lug 1717 so that the lever is rocked on its pivot and its upper arm thus moved rearwardly so as to act against the stud of the pawl and thereby disengage the latter from craves The means here shown'for determining the lowing description. On a pair of ests 1716 projecting from the panel 1710 ig. 0) there is supported a crossbar 1716;notched in its upper edge at the center, and the before mentioned rock shaft 17 04 carries a series of stop fingers 1792 adjustable lengthwise thereof and adapted to be fixed at difierent positions by means of set screws 1762 engaging a longitudinal slot or groove 1704 in said shaft, any one of these stop fingers being adapted to engage the notch in the crossbar carriage. A collar 1730 secured to one end ,of said step shaft carrier a plate 1717 "coupled by a link 1715 (Figs. 2 and 5) with the forwardly extending arm of a lever 1726 pivotally mounted intermediate of its ends u on the rock shaft 1703. The upper end 0 this lever is formed with a finger piece 1745 and it will be seen that the pressing forward of this arm of the lever will result'in downward movement of the late 1717 and corresponding rockin of t e shaft 1704 holding the carriage in its laterally adjusted position. A spiral spring 1784 normally enforces the engagement of the'stop finger with the notch, said spring being connected at one end with a stud 1764 on the plate 1717 and at the other end with a stud 1760 The rocking of the shaft 1704 is limited 1717 in the extension 1730 with a stud 1757 projecting from said end plate of the carriage.

scribed construction is well calculated to thoroughly fulfil all of the objects primarily stated and at the same time it is td be understood that this-construction is susceptible of considerable modification without departing from the scope of the invention. Consequcntly in the claims which follow essential details of construction.

\(hat is claimed is 1. In a machine of the character described the combination with carriage, cradle, roller platen and line-spacing mechanism; of means on the cradle cooperating with the carria e to disable the line-spacing mechanism bytfi'e rocking of said cradle.

2. In a machine of the character described the combination with carriage, cradle, roller lateral position of the carriage are of the fol- 1716 to determine the lateral position of the.

on the right hand end plate of the carriage 3 It will now be seen that the above dewhich will disengage rom the notch of the cross bar 1716 the stop finger 1792 which is 1 the engagement of the side edges of a notch elements are recited without limitation to platen, ratchet thereon, pawl engaging said ratchet, and means for actuating the pawl; of means on the cradle cooperating with the carriage to disable the pawl by the rocking of said cradle.

3. In a machine of the character described, the combination with platen, ratchet thereon, pawl engaging said ratchet, and means for actuating the' pawl; of means on the cradle cooperating with the carriage to displace the pawl by the rocking of sai cradle.

4'. In a machine of the character described, the combination with carriage, cradle, roller platen, ratchet thereon, pawl engaging said ratchet and carried by the platen, and means for actuating the pawl; of means on the cradle cooperating with the carriage to disable the pawl by the rocking of said cradle.

5. In a machine of the character described, the combination with carriage, cradle, roller platen, ratchet thereon, pawl carrier on the platen, pawl on said carrier for engaging said ratchet, and means for actuating the pawl,

of means on the cradle cooperating with the carria e to disable the pawl by the rocking of sai cradle.

6. In a machine of the character described, the combination with carriage, cradle, roller platen, ratchet thereon, pawl engaging said ratchet, and means for actuating the pawl; of a pawl controller on the cradle cooperating with the carriage to displace the pawl when the cradle is rocked.

7. In a machine of the character described, the combination of the carriage with lateral projection, the cradle rocking on the carriage, the roller platen supported in the cradle, the ratchet in said platen, the pawl engagin said ratchet, means for actuating the paw and a lever on the cradle cooperating with the lateral and with the pawl to displace the latter when the cradle is rocked.

' 8. In a machine of the character described, the combination of the carriage with lateral projection, the cradle roclking on the carriage, the roller platen s'u ported in the aten, the pawl cradle, the ratchet in said p engagin said ratchet, means for actuating the paw and a lever on thecradle having a cam-edge for engagement with the lateral projection of the carriage and an arm engagmg the pawl to displace the latter upon the rocking of the cradle. I

9. In a machine of the character described, the combination of the carriage with lateral projection, the cradle rocking on the carriage, the roller platen supported in the cradle, the ratchet in said platen, the pawl engaging said ratchet and having a lateral projection, the (pivoted pawl carrying arm, means connecte pawl, and a lever on the. cradle having a curveded e to engage the lateral projection of the pavfi and an arm cooperating with the carriage, cradle, roller projection of the carriage therewith for actuating the i carriage to displacethe pawl when the cradle is rocked.

10. In a machine of the character described, the combination of the carriage with lateral projection, the cradle rocking on the carriage, the roller platen supported in the cradle, theratchet in said platen, the pawl engaging said ratchet, and having a lateral projection, the pivoted pawl carrying arm, means connected therewith for actuating the pawl, and a lever on the cradle havin a curved edge to engage the lateral projection lateral projection of the carriage; su stantially as and for the purpose described.

1 1. In a machine of the character described, the combination with the laten and its linespacing ratchet and pawl of a pitman for actuating said pawl, an abutment adjustable lengthwise thereof, and a driving member act against said abutment.

12. In a machine of the character described, the combination with the platen and its linespacing ratchet and pawl; of a pitman for actuating said pawl having a curved slot with a series of recesses, an abutment occupying said slot and arranged to engage any one of said recesses, and a driving member having a uniform vibration and arranged to act against said abutment.

13. In a machine of the character described, the combination -with the roller platen, its ratchet, actuating pawl and. pawl actuator; of a stop member presenting an one direction and also to the pawl, to limit movement in the opposite direction.

- 14. In a machine of the character deplaten, its ratchet, pawl-carrying arm and pitman coupled to the latter; of a stop at one end and the pitman at the other.

15. In a machine of the character described, the combination with the roller platen, its ratchet, pawl-carrying arm, pitman, pivot stud connecting the latter with the pawl-carrying arm, and abutment or tappet piece on said pitman; of a sto member at one end confronting the sai pivot abutment or tap et-piece.

16. In a mac ine of the character described, the combination with the platen and its line-spacing ratchet and pawl; of driving mechanism, including a cam movable to positively actuate said pawl to turn the ratchet.

17. .In a machine of the character described, the combination with the platen and its line-spacing ratchet and pawl; of driving gmochanism, includin a cam movable to positively vibrate sai pawl. i 18. In a machine of thecharacter dehaving a uniform movement and arranged to abutment to the latter to limit movement inscribed, the combination with the roller member confronting the pawl-carrying arm stud and at the other end confronting said' of the pawl and a cam edge to enga e the ing a roll engaging said pressure to ho scribed, the combination with the platen and its rocking support, of 'm'eansfor exertin pressure to move said support to and ho d it in its foremost position, said means:

comprising a projection on said support and a s sai projection.

19. In a machine of the character described, the combination With the platen and its rockingsupport, of means for exertin pressure to move said support to and ho d it in its rearmost position, said means comprising a projection on said support and a spring-pressed member engaging said projection.

20. In a machine of the character described, the combination with the platen and its rocking support, of means for exerting said support in each of its extreme positions, said means comprising a projection-on said support and a s ringressedholding member engagin sai' proection alternately on o posite si es thereof.

21. In a machine 0 the character described, the combination of a platen, a

cradle supporting the same and having a projection, and a spring actuated lever havrojection.

22. In a machine 0 scribed, the combination of a platen, a cradle supportingthe same and having a tapered projection, and a spring-actuated lever having a roll engaging said projection alternately on opposite sides thereof.

23. In a machine of the character described, the combination of a carriage havring-pressed holding member engagingthe character de ing an-end flange, a platen, a cradle therefor having shoulders to engage the end flange of the carriage and thus limit movement of the cradle, and means for yieldingly impelling the cradle to one extreme or the other of its movement.

' 24:. In a machine of the character described, the combination of a carriage having an end flange, a platen, a cradle therefor having shoulders to engage the end flange of the carriage, and thus limit movement of the cradle, and having a. projection, and a spring actuated lever having a roll engaging said projection.

25. In a machine of the character described, the combination of a carriage having an end flange, a platen, a cradle therefor having shoulders to engage the end flange of the carriage and thus limit the movement of the cradle and having a tapered projection, and a spring-actuated lever having a roll engaging said projection alternately on opposite sides thereof.

261 In a machine of the character described, the combination with the elongated roller-platen, of a series of feed rollers extending parallel with the platen and independently spring-pressed into engagement therewith, a rock shaft having fingers, and arms journaled on said shaft and supporting the rollers and adapted to be engaged by said fingers to displace the rollers.

' OSCAR C. KREIS, JR. \Vitnesses i J. G. VINCENT, ALVAN MACAULEY. 

